GPU client side changes for GpuMemoryBuffers

gpu/command_buffer/client/gpu_memory_buffer_factory.cc

Index: gpu/command_buffer/client/gpu_memory_buffer_factory.cc
diff --git a/gpu/command_buffer/client/gpu_memory_buffer_factory.cc b/gpu/command_buffer/client/gpu_memory_buffer_factory.cc
index c0e5b9f60995db5efa330a78f3606b3c4433fd4e..5433b11851284aedea760ca0bc57e210a031a832 100644
--- a/gpu/command_buffer/client/gpu_memory_buffer_factory.cc
+++ b/gpu/command_buffer/client/gpu_memory_buffer_factory.cc
@@ -12,6 +12,10 @@ namespace {
 GpuMemoryBuffer::Creator* g_gpu_memory_buffer_factory_ = NULL;
 }
 
+namespace gles2 {
+ImageManager* g_image_manager_ = NULL;
+} // namespace gpu
+
 const GpuMemoryBuffer::Creator& GetProcessDefaultGpuMemoryBufferFactory() {
   return *g_gpu_memory_buffer_factory_;
 }
@@ -22,4 +26,14 @@ void SetProcessDefaultGpuMemoryBufferFactory(
   g_gpu_memory_buffer_factory_ = new GpuMemoryBuffer::Creator(factory);
 }
 
+gles2::ImageManager* GetProcessDefaultImageManager() {
+  DCHECK(gles2::g_image_manager_ != NULL);
+  return gles2::g_image_manager_;
+}
+
+void SetProcessDefaultImageManager(gles2::ImageManager* image_manager) {
+  DCHECK(gles2::g_image_manager_ == NULL);
+  gles2::g_image_manager_ = image_manager;
+}
+
 }  // namespace gpu